Pressure gauge of caulking gun



FIG. 1 is a front, right, top perspective view of a pressure gauge ofcaulking gun showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view of thereof, in the environment of acaulking gun, as it would appear in use.

The broken line showing of the caulking gun in FIG. 8 is provided forpurposes of environment and forms no part of the claimed design.

CLAIM I claim the ornamental design for a pressure gauge of caulkinggun, as shown and described.